129447-87-6

Upstream product

• 623171-37-9 [AgP(C₆H₅)3]⁽¹⁺⁾*SbF₆^(1-)=[AgP(C₆H₅)3](SbF₆) 
• 148807-09-4 hexakis(pyrazol-1-yl)benzene 
• 26042-64-8 silver hexafluoroantimonate 

Relevant academic research and scientific papers

Multinuclear NMR solution studies on complexes of hexakis(pyrazol-1-yl)benzene (hpzb) with Ag(I)

The reaction of the polydentate N-donor ligand hexakis(pyrazol-1-yl)benzene (hpzb) with AgSbF6/PPh3 or AgClO4PPh3 in a 1:1 ratio leads to the complexes [Ag(PPh3)(hpzb)]SbF6 (1) or [Ag(PPh3)(hpzb)]ClO4 (3). When two or three equivalents of the silver derivatives are used the species [Ag(PPh3)2]X are formed in addition to 1 or 3. In the case of SbF6- the remaining Ag+ competes with AgPPh3+ for coordination to hpzb and the derivative [Ag(hpzb)]SbF6 (2) is also obtained, while in the case of ClO4- the insoluble salt AgClO4 is formed. The same reactions performed with hpzb-15N12 confirmed the presence of the N-donor ligand in 1-3. At room temperature a Ag-P dissociation process is observed for all the derivatives containing Ag-PPh3 fragments. Complexes 1-3 show in solution an intramolecular argentotropic shift that makes the six pyrazolyl rings of the hpzb ligand equivalent on the 1H NMR time scale. When the amount of counteranion present in solution is sufficiently high, an intermediate of lower coordination number (stabilized with the anion) is observed for complexes 1 and 3 in the low temperature 31P NMR spectra in addition to the three-coordinated species. This intermediate is more stable in the case of ClO4- due to the higher coordinating ability of this anion.

X-ray crystal structure and31P NMR solution studies of [Ir2(dimen)4(PPh3)Au(PPh3)](PF 6)3 (dimen = 1,8-diisocyano-p-menthane). Observation of partial site preference in the formation of "outside" Ag and Au adducts

The reaction of [M(PPh3)2](PF6) (M = Ag, Au) with [Ir2(dimen)4](PF6)2 leads to the formation of heteronuclear complexes of the general formula [Ir2(dimen)4(PPh3)M(PPh3)](PF 6)3. Recrystallization of the Au complex from CH3CN/ether solution afforded crystals of [Ir2(dimen)4(PPh3)Au(PPh3)](PF 6)3-CH3CN (AuIr2C86H105F18N9P 5) that were the subject of an X-ray crystal structure characterization. The complex crystallizes in the monoclinic space group Cc (No. 9) with Z = 4; a = 24.79 (2), b = 15.792 (6), c = 23.307 (6) ?; β = 94.15 (4)°; V = 9102 A°3. At convergence, R = 0.055 and Rw = 0.064 for 6382 observed reflections. The crystal contains tripositive cations with a Au(PPh3)+ unit occupying one of the [Ir2(dimen)4]2+ axial sites and a PPh3 in the second axial position. The PPH3-Ir2-Au(PPh3) moiety features a two-electron two-center Ir-Au bond with a Ir-Au distance of 2.607 (2) ?. Au-P and Ir-P bond distances in the structure are 2.199 (7) and 2.482 (7) ?, respectively. The Ir(CNR)4 planes are nearly staggered with a twist angle of 39°. The Ir-Ir separation is 2.986 (2) ?. From 31P{1H} NMR solution studies and homonuclear 31P{1H} δ/J-resolved NMR spectroscopy, a nonstatistical distribution of five out of six different geometric isomers is present in CH2Cl2 solutions of both the Ag+ and Au+ complexes.